Casual & Play

Q: Does the metronome work offline?

Yes. The metronome uses the browser's own Web Audio API. Once the page is loaded, it works without a connection.

Randomizers, quick decisions and recreational instruments: coin flip, dice, spinner wheel, metronome and online piano.

Tools: 28
Updated: July 20, 2026

28 of 28 tools

Coin FlipperFlip a virtual coin with realistic 3D animation and make quick, unbiased decisions.
Dice RollerRoll virtual dice with 3D animation — D4, D6, D8, D10, D12 and D20 for tabletop RPG and board games.
Online MetronomeMetronome with animated pendulum, Web Audio API and precise BPM from 20 to 300 bpm.
Fortune CookieBreak a virtual fortune cookie and reveal your daily message with a cracking animation.
Online PianoVirtual piano with real piano sound, hold-to-sustain, configurable keyboard mapping, volume and MIDI support.
Meeting Cost CalculatorCalculate the estimated cost of meetings with a live timer, per-participant rate and recurrence.
Money Earned Since DateSee how much you would have earned since a date based on your stated income.
Spinner WheelNewCustomizable wheel of fortune to draw names, prizes or decisions, with per-item weights, colors and animation. Saves everything in your browser.
Team GeneratorNewSplit a list of names into balanced, random teams or groups, by number of teams or by size. Saves your list in the browser.
Random Number GeneratorNewDraw random numbers between two values, with or without repeats, using an unbiased cryptographic draw and sortable output.
Magic 8 BallNewThe classic Magic 8 Ball online: ask a yes-or-no question, shake the ball and get one of the 20 traditional answers.
Reaction Time TestNewMeasure your reflexes in milliseconds: click the moment the screen turns green and track your best time and average.
Click Speed TestNewFind out how many clicks per second (CPS) you do in windows of 1 to 60 seconds, with a record saved per duration.
Lottery Number GeneratorNewGenerate games for Mega-Sena, Lotofácil, Quina and more with an unbiased draw, real historical statistics (hot, cold and overdue numbers), advanced filters and last-result checking.
Yes or NoNewMake quick decisions with an unbiased yes or no answer, featuring animation, a best-of-N mode and a history of recent answers.
Lottery Result CheckerNewCheck your Mega-Sena, Lotofácil, Quina and more games against the official result of any draw, highlighting hits and prize tiers.
Lottery SimulatorNewTest a game against every draw ever held and see how many times it would have won, with a hit distribution and history.
Lottery StatisticsNewSee the most and least drawn numbers, each number's delay, sums, odds/evens and the latest results of every Caixa lottery.
Lottery Bet Cost CalculatorNewFind out how much it costs to bet with more numbers in each Caixa lottery, with the number of games covered and the top-prize odds.
Lottery WheelingNewBuild a wheel by choosing a pool of numbers and generate every game, with the total cost and the prize guarantee.
Lottery Odds CalculatorNewCalculate the odds of each prize tier in the Caixa lotteries based on the number of bet numbers, with the exact probability.
Lucky Number GeneratorNewDiscover your lucky numbers through the numerology of your name and birth date, with life path, destiny number and meanings.
Giveaway Winner PickerNewPaste a list of participants and draw one or more winners fairly, with backups, for raffles, draws and giveaways.
Online BingoNewGenerate bingo cards (75, 90, 80, 30-ball or word bingo) to print, call the balls with voice and a big-screen mode, and verify the winner by card code.
Poker Hand RankingsNewThe complete ranking of the 10 poker hands with real cards, the exact probability of each one, and an evaluator: build a 5-to-7-card hand and find out the result.
Blackjack Basic StrategyNewThe blackjack basic strategy chart computed on the fly for your table's rules (decks, S17/H17, DAS, surrender), with a quick advisor for hit, stand, double, split or surrender.
Live Blackjack AdvisorNewBuild the round in real time — your cards, the dealer's and other players' — and get the recommended action after every card, with the remaining shoe computed for real.
Typing Speed TestNewMeasure your words per minute (WPM) and accuracy by typing short passages, with history and progress saved in your browser.

Randomizers, quick decisions and recreational instruments

This category brings together tools for playful moments and quick decisions: flipping a coin when two options are equal, rolling dice for tabletop RPG or board games, keeping tempo while practicing an instrument, or simply exploring a melody on the virtual piano.

The visual highlight is intentional: each tool has its own carefully crafted animation, a coin spinning in the air, a metronome pendulum with real physics, a die rolling in 3D. All processing happens locally in the browser.

Available tools in this category

Coin Flipper (3D coin animation), Dice Roller (D4 to D20 with 3D animation), Online Metronome (animated pendulum and Web Audio API), Rock Paper Scissors (animated countdown and scoreboard), Fortune Cookie (cracking animation) and Online Piano (2 octaves with keyboard mapping).

Frequently asked questions

Are the results truly random?

Yes. All draws use crypto.getRandomValues(), the browser's cryptographically secure API, which provides entropy far superior to conventional Math.random().

Does the metronome work offline?

Explore next

MathematicsPrecise math calculators: number bases, fractions, GCD/LCM, primes, combinatorics, Fibonacci, correlation and regression.LegalBrazilian legal calculators: CLT severance, judgment liquidation, attorney fees, labor and civil debt indexation, social security and real estate.GamesTools for players and server owners, organized by game: generators, calculators and utilities that run in the browser.Astrology & TarotBirth chart with real planetary positions, rising sign, moon sign, compatibility, numerology, tarot and horoscope — computed in your browser, for entertainment.